Automatic blood analyzer
US4030888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1976 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Feb 17, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A fully automatic system is disclosed for determining the seven blood parameters, red blood counts (RBC), hematocrit (HCT), white blood counts (WBC), mean corpuscular hemoglobin (MCH), mean corpuscular volume (MCV) and mean corpuscular hemoglobin concentration (MCHC). The blood sample collected is divided into two solutions, one for use in red blood counts and subjected to the colorimetric analysis for HGB determination and the other for use in white cell counts. A portion of the RBC solution is subjected to the double blood dilution and it enters a red cell counting portion. The peak value of electrical pulses supplied by said counting portion is indicative of the hematocrit. These data are used by preset arithmetic circuits to determine MCH, MCV and MCHC. White blood corpuscles are counted by a counting means of the same structure as that of the red cell counting portion. The flow of a diluent and the blood solution starting from the introduction of the sample, to counting portions, means for determination, and to the outlets are controlled by the supply of either vacuum or pneumatic pressure into two rotary proportioning cocks and chambers positioned upstream or downstream there…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.